Zamora impressed in Saturday's 1-1 draw against Arsenal, although quotes from Jol after the match suggested he needs to become more prolific.
"I think there are more goals in us but it is only about scoring once. I am 100% certain we will do that and defensively we are good. In the last 10 games away from home we conceded six.
"In the last five in the league, we conceded three so we are pretty organised and we create chances, as you saw against Arsenal.
"Against Sunderland and against Wigan - when we won 2-0 - we were very close.
"The thing is, like we did against Wigan, we had six or seven attempts and we scored two.
"Against Spurs we had 28 attempts and only scored an own goal so it is only a matter of confidence and getting it right, like we did against QPR.
"We scored six and it all came together so there are goals in us."